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mod_python, COM, on win2k3 server

 
 
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      05-20-2006
I have an application that runs on mod_python/apache using the publisher
handler. It uses an access db as the backend and connects via ADO. In a
test environment on XP it runs fine, but when on a win2k3 server it will
load one page, but all subsequent page loads throw a
pythoncom.CoInitializeEX error until I restart the apache.

Presumably, this is a threading issue, but I am not sure what the best
approach to fixing it is. Should I simply wrap all COM calls with
pythoncom.CoInitialize/pythoncom.CoUninitialize calls, or is this somethig
that needs to be done at a lower level.

This is mod_python 3.2, Python 2.3.5, apache2.0.*, win2k3, ado 2.8, and the
server has 2 processors in case that matters.

Thanks,

-d


 
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      05-20-2006
Some details, and this is weirder than I thought.

It is working fine with internet explorer or mozilla as the client, but only
crashes with Firefox. Moreover, even while firefox is getting errors, IE
stilll works fine.

The error I get is:

Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

File "C:\Python23\Lib\site-packages\mod_python\apache.py", line 299, in
HandlerDispatch
result = object(req)

File "C:\Python23\Lib\site-packages\mod_python\publisher.py", line 213, in
handler
published = publish_object(req, object)

File "C:\Python23\Lib\site-packages\mod_python\publisher.py", line 410, in
publish_object
return publish_object(req,util.apply_fs_data(object, req.form, req=req))

File "C:\Python23\Lib\site-packages\mod_python\util.py", line 439, in
apply_fs_data
return object(**args)

File "E:\http_server\timeslips\index.py", line 84, in index
rtn.append(ts_widget.make_employee_picker())

File "C:\Python23\lib\site-packages\ecptimeslips\ts_widget.py", line 128,
in make_employee_picker
rs = win32com.client.Dispatch("ADODB.Recordset")

File "C:\Python23\Lib\site-packages\win32com\client\__init__.py", line 95,
in Dispatch
dispatch, userName =
dynamic._GetGoodDispatchAndUserName(dispatch,userN ame,clsctx)

File "C:\Python23\Lib\site-packages\win32com\client\dynamic.py", line 91,
in _GetGoodDispatchAndUserName
return (_GetGoodDispatch(IDispatch, clsctx), userName)

File "C:\Python23\Lib\site-packages\win32com\client\dynamic.py", line 79,
in _GetGoodDispatch
IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx,
pythoncom.IID_IDispatch)

com_error: (-2147221008, 'CoInitialize has not been called.', None, None)

?


 
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